The developers

Built by people who keep it.

ANDAS was developed by Helisis and Gestion Kokolakis. We did not build it to sell it: we keep it, and our team takes care of it.

See available units Book a visit

Living room of an ANDAS apartment under the mass timber ceiling

How we work

A family company, since 2002.

Our mission has not changed since the first building: to make a positive difference in the lives of our tenants, our team and our community, and to offer places where people live and work in dignity and comfort.

Building for the generations to come
We do not build to resell, but to last. Every building we develop stays in the family and is managed by our own team. This long-term vision guides each of our decisions: we build today with the next fifty years in mind, not just the day of delivery.
Owners who answer
More than twenty years of managing apartments have taught us what lasts, what breaks and what tenants really love. Those lessons show up in every plan, from the layout of a kitchen to the soundproofing between floors.
Hospitality, not just housing
A building is more than its apartments. A lobby where you want to sit down, an urban chalet on the roof: it is in the shared spaces that a building becomes a place to live.

The partners

Two kinds of expertise at the same table.

One has spent his career owning and managing apartments. The other, building them. Every decision benefits from both points of view.

Helisis

Kai Xiong Zhang

Kai is the second generation of the family behind Helisis. He began managing the family's apartments while studying at HEC Montréal, where he earned his bachelor's degree in finance and entrepreneurship with distinction, and did an exchange at HEC Lausanne. He joined the family business in 2014 by founding Gestion Helisis, and helped it grow to more than 500 apartments in Montreal and on the South Shore.

His expertise: owning buildings for the long term, from financing to day-to-day management. He also co-founded the PÉR HEC program, which welcomes refugee students to HEC Montréal.

Gestion Kokolakis

Tania Kokolakis

Tania is a civil engineer, trained at McGill University, and holds an MBA from HEC Montréal. She began her career at Quadrax, then held leadership positions at QMD and Carbonleo, where she played a key role in building the Four Seasons Montréal and its private residences.

She then founded Gestion Kokolakis, her own real estate development and investment company. Her expertise: engineering, cost control, construction and delivery, in concrete as well as wood.

Helisis

It all started with an 8-unit building in Montreal.

In 2002, Xiao Dong Zhang and Hong Sun bought their first building, an 8-unit building in Montreal. They still run the company. Their son Kai joined them in 2014.

Today, the family takes care of apartments near McGill University and across Montreal, with an emergency line open day and night and its own team on the road. ANDAS, in Lachine, is its newest building.

helisis.ca

The construction

Six storeys of mass timber, left exposed.

Syscomax built ANDAS from July 2024 to September 2025. The floors are cross-laminated timber (CLT) from Nordic Structures, carried by wood beams and columns, on a concrete garage. There is no concrete slab between floors: soundproofing relies on a dry screed and on walls designed with HGC, acoustics specialists. The wood of the structure comes from FSC-certified forests.

14 months: of construction, July 2024 to September 2025
6 storeys: of mass timber, on a concrete garage
53: apartments, from studio to 3 bedrooms
Gold: at the 2026 Grands Prix du Design

The construction in pictures, in the team's own words

The project team

The people who made ANDAS

Helisis
Development
Gestion Kokolakis
Development
Syscomax
Construction
NEUF architectes
Architecture and design
L2C Experts
Structure
Nordic Structures
Mass timber
Équipe SP
Mechanical and electrical
Équipe Laurence
Civil engineering
HGC
Acoustics

By the same team

Solaris, in Boisbriand

Nine storeys in Faubourg Boisbriand, delivered in 2023, with a rooftop pool.

Visit solarisboisbriand.com

Built by people who keep it.

A family company, since 2002.

Building for the generations to come

Owners who answer

Hospitality, not just housing

Two kinds of expertise at the same table.

Kai Xiong Zhang

Tania Kokolakis

It all started with an 8-unit building in Montreal.

Six storeys of mass timber, left exposed.

The people who made ANDAS

Solaris, in Boisbriand

Address

Address

Address